Instantiate menuInterface earlier to avoid race condition

[iquito]

When trying to overwrite a menu element via something like this:

var instance = new Accessibility();
instance.menuInterface.increaseText = function() {
    // My own way to increase text size . . .
}

I had the problem that I got the error "Cannot set properties of undefined", because it seems menuInterface had not been created when I tried to call the code, because it is created in the "build" method of the class Accessibility which is called in an async way. Looking through the code I did not find a reason why menuInterface is not just defined early in the constructor (maybe in the past there was a reason why it was initialized this late, but that reason is not around anymore?).

So I suggest to just create the object early on and not in an async method in order to make overwriting menu items work as suggested in the manual - currently I guess it is a race condition, but I would assume it usually fails, as it fails every time on my project. If I run the same code 2 seconds later it works fine.